<!DOCTYPE html>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
	<title>label</title>
	<style type="text/css">
	* {
		padding: 0;
		margin: 0;
	}

    </style>
</head>
<body>
	<div class="container">
		<h1>label</h1>
		<div id="box">
			<ul id="ul">
				<li>1</li>
				<li>2</li>
				<li>3</li>
			</ul>
		</div>
	</div>

<script type="text/javascript"> 

let hd = "houdunren";
let hd2 = new String(hd); 
console.log(hd == hd2, hd === hd2)	// true, false
console.log(typeof hd, typeof hd2); //string object


</script>
</body>
</html>